12421203040020 has 96 divisors (see below), whose sum is σ = 34805957921280. Its totient is φ = 3309789248640.

The previous prime is 12421203039991. The next prime is 12421203040021. The reversal of 12421203040020 is 2004030212421.

It is a super-2 number, since 2×12421203040020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421203040021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 994405975 + ... + 994418465.

It is an arithmetic number, because the mean of its divisors is an integer number (362562061680).

Almost surely, 2^{12421203040020} is an apocalyptic number.

12421203040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421203040020 is an abundant number, since it is smaller than the sum of its proper divisors (22384754881260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421203040020 is a wasteful number, since it uses less digits than its factorization.

12421203040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23845 (or 23843 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12421203040020 its reverse (2004030212421), we get a palindrome (14425233252441).

The spelling of 12421203040020 in words is "twelve trillion, four hundred twenty-one billion, two hundred three million, forty thousand, twenty".